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-Parfum. .Improvement in Circular Saw Mi-Ils.

No. 124,142. Patented Feb.27, 1872.

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Fig. G INVENTB.

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12eme PHILANDER P. LANE, oE CINCINNATI, onto, AssIeNon To LANE a BoDLEY,

0E sAME PLAGE. i

IMPRVEMENT iN CIRCULAR=SAW MILLS.

Specification forming part ofLetters Patent No. 124,14?, dated February27, 1872.,

I, PHILANDEE P. LANE, of Cincinnati, Hamilton county, Ohio, haveinvented a new and useful Improvement in GirculanSaw Mills, of which thefollowing is a specification:

This is an improvement in the class of com.- bined feed and reverseapparatusl for saw-mills which enables the sawyer, by means of a simplelever, to either advance, stop, or back the carriage without arrestingthe rotation of the saw or disconnecting the motive power, and myinvention consists in a mechanical arrangement, whereby thereversing-pulley, which communicates the backing motion to thepinion-drum, is made to acquire its proper velocity from thedriving-pulley before coming in contact with the piniondrum, theconnection between the lever and the said reversing-pulley being alsosuch as to insure constant contact of said pulley with both the driving`and the driven surfaces during the entire reverse stroke of thecarriage, and this although one or more of said surfaces may becomeirregularly worn. The invention relates particularly to the feed andreverse motion of myself and S. R. Smith, subject-matter of patent No.22,- 268, issued December 7, 1858, to Lane & Bodley, assigiees, which isthe basis represented.

Figure l is a perspective view of a port-ion of a circular-saw millembodying my invention, the parts being set for giggingback.77 Figs. 2and 8 are elevations, showing the positions of the operative parts forthe forward stroke and for the backward stroke respectively.

A is a portion of the frame of a circular-saw mill 5 B, its saw-arbor 5C, drivin g-pulley on sawarbor 5 D, the pinion, which engages with thecarriage-rack E, F, the shaft of same; G, the drum upon thepinion-shaft. His the small friction-pulley, which, when brought intocontact with the drum Gr, operates to impel the log-carriage forward.One end of the shaft I of the frictioupulley H is journaled in a pivotgiinbahbox, J, and its other end in a gimbalbox, K, which rests in oneend of a rocker, L, whose opposite end supports the reversing`friction-roller in a peculiar manner, to be hereinafter explained. vTheshaft J carries a step or graduated pulley, M, which is driven by aband, N, from a corresponding pulley, O, upon the saw-arbor. l is thehand-lever on one end of shaft Q, whose other end has a crank, R,connected by a pitman, Y, with a toggle, W X.

All of the parts above recited have been used before.

The rear extremity of the shaft s of the reversing-pulley S is journaledin a pivot gimbalbox, T. The gimbal-box U, which supports the frontjournal of shaft s, is not attached directly to the rocker L, but to theupper end of an arm, V, that is pivoted at or near its mid height to oneend of the rocker L, and has its lower end pivoted to the upper member Wof the toggle W X.

The operation is as follows: It being desired to reverse or gig back7the carriage, the lever P is shift-ed from its position in Fig. 2 to itsposition in Fig. 3. This mot-ion of the lever, by drawing back thepitman Y, acts through the toggle W X, to elevate the feedpulley, and todraw downward and slightly inward the lower end of arm V, so as to throwits upper end downward and outward, and, by so doing, to'bring thereversing-pulley S in contact with the live or driving-pulley C, ofwhose motion it partakes, and immediately afterward to bring said pulleyin contact with the piuiondrum Gr, imparting to the latter, and throughit the carriage, a rapid retrograde or gigging-back motion. The lever,being brought to a vertical position, releases both friction-pulleysfromcontact with the piniondrum; and a motion of the lever toward thelposition shown in Fig. 2 reverses the abovedescribed actions of theseveral parts, the pulley S first leaving the pinion-drum, and then thedriving-pulley and the two members lV X of the toggle, approachingcoincidence, operate by elevating the reverse end of the rocker todepress its other end, and to press the pulley H rmly upon thepinion-drum. The relative position of the two members lV X ofthe toggleat this juncture becomes a lock, which holds the pulleyLl with greatpowerto its work, with little or no labor to the sawycr until a backwardmovement again becomes necessary. My described flexible or yieldingconnection of the pulley S with the rocker L, and the described toggleand pitman connection o f the former with the operating lever, insuresthe proper momentum of the reversing pulley before striking,` thepinion-drum. It also enables the said reversing-pulley to actcontinuously and with equal pressureon both the opposing surfaces, andtl1is even after one or both of said surfaces have become unequallyworn.

Claims.

I claim herein as new and of myinventionl. The eXible supportVfor thebearingUof the reversing or gigbael; pulley S, the 4sii-me operating, asdescribed, to give seid pulley an equal bearing on the drivin g-pulley Gand piniondru1n G.

2. The combination of the arm or Vlever V set my hand.

v PHILANDER P. LANE.

Witnesses:

GEO. H. KNIGHT, JAMES H. LAYMAN.

